Microwave dielectric heating behaviour of supported MoS2 and Pt catalysts
Microwave dielectric heating behaviour of supported MoS2 and Pt catalysts
The temperature of supported MoS2 and Pt catalysts was measured during microwave heating at constant input power by inserting a thermocouple into the center of the catalyst bed immediately after the microwave power had been turned off at the end of progressively longer heating times. Thermal runaway was observed with MoS2/Al2O3 and Pt/Al2O3 at temperatures in the range 285-300 C when the power absorbed rose with temperature at a rate greater than that at which heat is lost by cooling. This condition was not attained with MoS2/SiO2, and thermal runaway was not observed. For the MoS2 catalysts, the fraction of the microwave power absorbed, , was found to vary with temperature according to the equation = cA + cM exp(-Ea/RT), where cA and cM are constants and the activation energy, Ea, is 9.3 kJ mol-1 for MoS2/Al2O3 and 11.1 kJ mol-1 for MoS2/SiO2.
2810-2817
Zhang, X.
d7cf1181-3276-4da1-9150-e212b333abb1
Hayward, D.O.
de16843b-f75c-4a7d-a001-fb862ce747e6
Mingos,, D.M.P.
8702259b-54c3-489b-9fb5-0e898c48f8d3
1 June 2001
Zhang, X.
d7cf1181-3276-4da1-9150-e212b333abb1
Hayward, D.O.
de16843b-f75c-4a7d-a001-fb862ce747e6
Mingos,, D.M.P.
8702259b-54c3-489b-9fb5-0e898c48f8d3
Zhang, X., Hayward, D.O. and Mingos,, D.M.P.
(2001)
Microwave dielectric heating behaviour of supported MoS2 and Pt catalysts.
Industrial and Engineering Chemistry Research, 40 (13), .
(doi:10.1021/ie0007825).
Abstract
The temperature of supported MoS2 and Pt catalysts was measured during microwave heating at constant input power by inserting a thermocouple into the center of the catalyst bed immediately after the microwave power had been turned off at the end of progressively longer heating times. Thermal runaway was observed with MoS2/Al2O3 and Pt/Al2O3 at temperatures in the range 285-300 C when the power absorbed rose with temperature at a rate greater than that at which heat is lost by cooling. This condition was not attained with MoS2/SiO2, and thermal runaway was not observed. For the MoS2 catalysts, the fraction of the microwave power absorbed, , was found to vary with temperature according to the equation = cA + cM exp(-Ea/RT), where cA and cM are constants and the activation energy, Ea, is 9.3 kJ mol-1 for MoS2/Al2O3 and 11.1 kJ mol-1 for MoS2/SiO2.
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MW_heating_Ind_Eng_Chem_Res_v40pp2810-2817.pdf
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Published date: 1 June 2001
Organisations:
Engineering Mats & Surface Engineerg Gp, Chemistry
Identifiers
Local EPrints ID: 49100
URI: http://eprints.soton.ac.uk/id/eprint/49100
ISSN: 0888-5885
PURE UUID: 61117a01-afaf-49d4-9f5e-237bdae3b646
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Date deposited: 24 Oct 2007
Last modified: 16 Mar 2024 03:55
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Author:
D.O. Hayward
Author:
D.M.P. Mingos,
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